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Rare-earth element. Refined rare-earth oxides are heavy, gritty powders usually brown or black, but can be lighter colors as shown here. The rare-earth elements ( REE ), also called the rare-earth metals or rare earths or, in context, rare-earth oxides, and sometimes the lanthanides (although scandium and yttrium, which do not belong to this ...
Shinto. The torii gateway to Itsukushima Shrine in Hiroshima Prefecture, Japan, one of the most famous examples in the country. [1] Torii mark the entrance to Shinto shrines and are recognizable symbols of the religion. Shinto ( Japanese: 神道, romanized : Shintō) is a religion originating in Japan. Classified as an East Asian religion by ...
To-Shin Do is a martial art founded by Black Belt Hall of Fame instructor Stephen K. Hayes in 1997. [1] [2] It is a modernized version of ninjutsu, and differs from the traditional form taught by Masaaki Hatsumi ’s Bujinkan organization. [3] Instruction focuses on threats found in contemporary western society. [4]
Chromium, 24Cr. body-centered cubic (bcc) ( cI2) Chromium is a chemical element; it has symbol Cr and atomic number 24. It is the first element in group 6. It is a steely-grey, lustrous, hard, and brittle transition metal. [7] Chromium metal is valued for its high corrosion resistance and hardness.
An extended periodic table theorizes about chemical elements beyond those currently known and proven. The element with the highest atomic number known is oganesson ( Z = 118), which completes the seventh period (row) in the periodic table. All elements in the eighth period and beyond thus remain purely hypothetical.
Abundance (atom fraction) of the chemical elements in Earth's upper continental crust as a function of atomic number; [5] siderophiles shown in yellow. Graphs of abundance against atomic number can reveal patterns relating abundance to stellar nucleosynthesis and geochemistry . The alternation of abundance between even and odd atomic number is ...
Astatine is a chemical element; it has symbol At and atomic number 85. It is the rarest naturally occurring element in the Earth's crust, occurring only as the decay product of various heavier elements. All of astatine's isotopes are short-lived; the most stable is astatine-210, with a half-life of 8.1 hours. Consequently, a solid sample of the ...
The sign of the Deathly Hallows represents all three objects symbolically: the Wand, the Stone, and the Cloak. The Deathly Hallows are three magical objects that are the focus of Harry Potter and the Deathly Hallows – the Elder Wand, the Resurrection Stone, and the Cloak of Invisibility. When owned by one person, they are said to give mastery ...